OPEN MAGNETIC SHIELD STRUCTURE AND ITS MAGNETIC FRAME

摘要

Magnetic plates (1) are so stacked at predetermined plate intervals (d) that the longitudinal center axes (C) of the plates (1) are generally parallel in the same louver surface (including a curved surface) (F), thereby forming a magnetic louver body (2). A plurality of such louver bodies (2a, 2b) are connected in line by superposing or butting the ends of the corresponding magnetic plates (1) of the louver bodies (2a, 2b), thus forming a magnetic shield surface. Preferably, a closed magnetic path is formed by connecting three or more magnetic louver bodies (2) in line along the surface of the shielded object. Further preferably, louver bodies (2a, 2b) facing the confined magnetic field (M) are so stacked on one the other that the louver surfaces (Fa, Fb) are generally parallel to each other. By determining the directions of the center axes (C) of the magnetic plates (1), a required shielding performance against the magnetic field (M) is given.